19896640

素因数分解:

$2^6\times 5^1\times {\mathrm{97}}^1\times {\mathrm{641}}^1$

素因数の和:755

約数の個数: 56

約数和(自身を含む): 47941992

約数和(自身を除く): 28045352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 160, 194, 320, 388, 485, 641, 776, 970, 1282, 1552, 1940, 2564, 3104, 3205, 3880, 5128, 6208, 6410, 7760, 10256, 12820, 15520, 20512, 25640, 31040, 41024, 51280, 62177, 102560, 124354, 205120, 248708, 310885, 497416, 621770, 994832, 1243540, 1989664, 2487080, 3979328, 4974160, 9948320, 19896640]

約数ペア:

[(1, 19896640), (2, 9948320), (4, 4974160), (5, 3979328), (8, 2487080), (10, 1989664), (16, 1243540), (20, 994832), (32, 621770), (40, 497416), (64, 310885), (80, 248708), (97, 205120), (160, 124354), (194, 102560), (320, 62177), (388, 51280), (485, 41024), (641, 31040), (776, 25640), (970, 20512), (1282, 15520), (1552, 12820), (1940, 10256), (2564, 7760), (3104, 6410), (3205, 6208), (3880, 5128)]